Grate-bar and grate for boiler or other furnaces



N0. 607,263. W. MDCLAVE.

GBATE BAR AND GRATE FOB BOILER OR OTHER FURNACES.

Patented July I2, I898.

(Application filed Nov. 10, 1897.)

(No Model.)

INVENTOR WITNESSES Patented July I2, I898.

I W. MOCLAVE. GRATE BAR AND GRATE FOR BOILER OR OTHER FURNACES.

(Application filed Nov. 10, 1897.)

5 Sheets-Sheet 2.

(No Model.)

INVENTOR Patented m l2, I898.

I w. McCLAVE. GBATE BAR AND GRATE FOR BOILER OR OTHER FURNACES.

WITNESSES INVENTOR No. 607,263. Patented July l2, I898. W. McCLAVE.

GRATE BAR AND GRATE FOBBUILER OR OTHER FURNACES.

(Application filed Nov. 10,,1897.) (No Model.)

5 Sheets-Sheet 4.

r l k WITNESSES INVENTOR N 60 t 11 I2 9 0 7,263 w. Mom-AVE Paten e July l8 8 GBATE BAR AND GRATE FUR BOILER OR OTHER FURNACES.

(Application filed Nov. 10, 1897.) (No Model.) 5 SheetsSheet 5.

WITNESSES m: uonnls Perms co.. PHOYD-LITHQ, wnsumm'on, 04 c.

UNITED STATES PATENT Enron.

IVILLIAM MOOLAVE, OF SORANTON, PENNSYLVANIA.

GRATE-BAR AND GRATEFOR BOILER OR OTHER FURNACES.

SPECIFICATION forming part of Letters Patent No. 607,263, dated July 12, 1898.

Application filed November 10, 1897. Serial No- 658,064. (No model.)

To all whom it may concern:

Be it known that 1, WILLIAM MCCLAVE, a

citizen of the United States, residing at Scran-j ton, in the county of Lackawanna and State of Pennsylvania, have invented certain new and useful Improvements in Grate-Bars and Grates for Boiler or other Furnaces; and I do hereby declare the following to be a full,

clear, and exact description of the invention,

struction of removable fingers, which, with the body portion of the grate-bar, constitute the grate-bar proper; second, in a grate composed of a series of such bars, and, third, to novel means for securing the fingers in place within the body portion of the grate bar, whereby numerous advantages are secured, as will be hereinafter described.

In the accompanying drawings, Figure 1 is a perspective view of my invention as applied to an approximately inverted- L shapedrockin g grate-bar. Fig. 2 is a top plan View of the same. Fig. 3 is a vertical longitudinal section through the same. Fig. 4 is a horizontal section through the body portion of the bar. Fig. 5'is a vertical transverse section through the bar. Fig. 6 is a perspective view of the body portion of the bar with the fingers removed. Fig. 7 is a view showing the underside of the body portion of the gratedoar. Fig. Sis a detail perspective view of an approximately inverted- L-shaped finger. Fig. 9 is a vertical trans verse section through the body portion of the bar, showing the partitions forming the sockets as cut away slightly below the upper edge of the same. Fig. 10 is a perspective view of my invention as applied to an approximately T-shaped rocking grate-bar. Fig. 11 is avertical transverse section through the same. Fig. 12 is a perspectiveview of an approximately T-shaped finger. Fig. 13 is a perspective view of my invention as applied to astationary grate-bar. Fig. 14 is atop plan View of the same, but in this instance the outer edges on both ends of the teeth of the fingers 'are in the same vertical plane longitudinally of the fingers and not arranged in a zigzag manner; and Fig. 15 is a side elevation of a slightly-modified form of finger, the shank being located to one side of the center of the head longitudinally of the same. Fig. 16 is a perspective view of a rocking grate constructed in accordance with my invention.

A in the drawings represents a rocking grate-bar, which is composed of a body portion (Land removable approximately L-shaped fingers a. The body portion consists, preferably, of a single casting having spaced side walls a a and end walls a a. Vertical partitions a, extending, preferably, the entire depth of the body portion of the bar, are formed between the side walls and form a series of open-ended sockets a for the reception of the shanks a of the removable fingers a. In cross-section the body portion may be of any suitable shape. Journals a are formed on the end walls a a of the body portion at any suitable point, and a connecting-bar j ournal a is formed on' the under side of the bar at any suitable point. p

In Fig. 9 I have shown the partit'ons formingthe sockets in the body portion with their upper edges cut away, as at a ,belowthe upper edge of the body portion proper. This will be found an advantageous construct'on undercertain conditions. The sockets are made preferably tapering outwardly from bot tom to top, and one side wall of the body portion is formed with passages c0 C0 for the insertion of a tool for securing the fingers in place, as will be hereinafter described.

The fingers a, which are used in the style of grate-bar now being described, are of the same shape, though the teeth a, instead of being arranged in a zigzag manner, may have all of their outer edges on both ends in the same'vertical plane longitudinal of the finger. The teeth are preferably beveled on their under surfaces, as shown. The head a of the finger extends a considerable distance above the upper edge of the body portion proper of the grate-bar, and this is accomplished by forming it with a thinned web a transverse to the body portion. The back lower end of this web portion is formed with abutmen lugs a a, extending on both sides of the web, which also serve to support the finger from the web )ortion a and at ri ht an les b h to said web portion. By constructing the finger with a comparatively high vertical web transverse to the grate bar and forming it with a shank at right angles to said web the intense heat is not only removed farther away from the body portion of the grate-bar, but.

the heat-line by conduction is broken to a large extent. The back of the shank a is formed with a shoulder a for receiving the bent end of a locking-key, as will now be described. \Vhen a finger is placed in position in one of the sockets a and is forced down, it is held in place by a wed ge-shaped key a, which is inserted in a key-seat (b 011 the under side of the grate-bar and is of sufficient length to project sufficiently above the shoulder a on the shank of the finger and to be turned over against said shoulder by means of a suitable tool, which is inserted through the passages a In removing the fingers for the purpose of inserting new ones it is simply necessary to force the same out from the under side of the bar by the use of an ordinary (C Set-J7 Thus far the description has had reference to a grate-bar constructed of approximately inverted-L-shaped fingers. I will now proceed to describe the construction of a gratebar composed of approximately T-shaped lingers. In many respects they are the same in construction as the grate-bars just described, but they diifer in the following particulars: The body portion of the grate bar proper where the inverted-L-shaped fingers are employed slants downwardly and forwardly, and the back wall of the same is made on a cymareversa curve in order to facilitate one of the rocking movements peculiar to this construc tion of bar and the movements of said bars with respect to each other and to the formation of deep pockets between the respective grate-bars without a large space being formed between the same for the accidental discharge of fuel, as shown and described in'my Letters Patent No. 318,007. here T-shaped gratebars I3 are employed, as shown in Fig. 11, the sockets b in the body portion are arranged. vertically and preferably diverge from bottom to top, the largest part of the opening being at the top. The construction of the fingers Z) is practically the same as the inverted- L-shaped fingers, except that the shank b is arranged centrally of the length of the head portion b and extends downwardly from the same in a vertical manner. with this construction a key to secure the fingers in place is not absolutely required, as there is not the same tendency for the fingers to draw out as there is in the inverted-L-shaped construction. The teeth b may be arranged in a zigzag manner, as shown in Fig. 2 of the drawings, or they may be arranged to have their outer ends come in the same vertical plane longitudinally of the lingers, as shown in Fig. 14:.

In Fig. 13 I have shown the invention applied to a stationary grate-bar. The construction of the parts is practically the same as in the T'shaped bar, with the exception that it is not provided with journal ends or a connecting-bar journal, and the shank on the fingers may be arranged vertically a little to one side of the center longitudinally of the head for the purpose of making the fingers break spaces between the bars.

In Fig. 16 I have shown a rocking grate constructed in accordance with myinvention and composed of a series of grate bars and fingers, as herein described. The manner of connecting the grate'bars and operating the grate forms no part of my present invention, the same being covered by my Letters Patent No. 529,291, and dated November 13, 1.894.

The advantages of the different construetions are obvious from the foregoing description and produce a grate which admits of perfect ventilation to the fuel'from below, the fingers of which can be conveniently removed when they have become burned out and new ones substituted therefor.

A grate constructed with grate-bars in ac cordanee with my invention, as above described, is adapted to burn fuel of any size, as the openings between the outer ends of the adjoining grate-bars and the meshes formed between the teeth of the fingers can be made relatively larger or smaller without departing from my invention, according to the size of fuel it may be desired to burn.

The constructions described and shown may be slightly varied without departing from my invention.

Ilaving new described my invention, what I claim as new, and desire to secure by Letters Patent, is-- 1. As an improved article of manufacture, a finger for a rocking grate-bar composed of a single piece of metal, and comprising in its construction a head having laterally-extending teeth and a downwardly-extending flattened shank, a thin vertical web connecting the same, the shank extending at right angles to the web and parallel with the teeth, and an abutment-lug at theupper end of the shank to form a seat for the finger on the top of the body portion of the grate-bar, the said lug having outwardly and downwardly divergent top surfaces which prevent the collection of ashes on the lug, the finger being so constructed that a strong shank is secured which does not necessitate a socket portion on the bar so large as to materially obstruct the draft and to also materially diminish the depth of the pockets formed between the grate-bars, when the grate-bars are rocked to cut out clinkers and ashes,substantially as described.

2. As an improved article of manufacture, a finger for a rocking grate-bar composed of a single piece of metal, and comprising in its construction a head having laterally-extending teeth, which are beveled on their under surfaces and arranged in a zigzag manner, a (lownwardly-extendin g flattened shank, a thin vertical web connecting the same, the shank extending at right angles to the web and parallel with the teeth, and an abutment-lug at the upper end of the shank to form aseat for the finger on the top of the body portion of the grate-bar, said lug having an outwardly and downwardly divergent top surface which prevents the collection of ashes on the lug, substantially as described.

3. A rocking grate-bar comprising in its construction abody portion properprovided with spaced elongated sockets, fingers inserted in said sockets, each of said fingers comprising a head having laterally-extending teeth and a downwardly-extending flattened shank, and a thin vertical web connecting the same, the shank extending at right angles to the Web and parallel with the teeth, whereby a strong shank is secured which does not necessitate a socket portion so large as to materially obstruct the draft and to also diminish the depth of the pockets when the bar is usedin cutting out clinkers and ashes, substantially as described.

et. A rocking grate comprising in its construction a plurality of grate-bars, each of which comprises in its construction a body portion proper provided with spaced elongated sockets, and fingers inserted into said sockets, each of said fingers comprising a head having laterally-extending teeth and a downwardly-extending flattened shank, andathin vertical Web connecting the same, the shank extending at right angles to the web and parallel with the teeth, whereby a strong shank is secured which does not necessitate a socket portion so large as to materially obstruct the draft and to also diminish the depth of the pockets when the grate is rocked to cut out clinkers and ashes,substantially as described.

5. A grate-bar comprising in its construction a body portion proper provided with spaced sockets, transverse openings formed in the side of the bar and extending into the sockets, fingers inserted in the said sockets, each of said fingers comprising a head having laterally-extending teeth and a downwardlyextending shank formed with a shoulder, and a key driven into the bar from its under side and bent over to engage the shoulder on the finger, substantially as described.

6. A grate comprising in its construction a plurality of grate-bars, each of which comprises in its construction abody portion proper provided with spaced sockets, transverse openings formed in the side of the bar and extendinginto the sockets,fingersinsertedin the said sockets, each of said fingers comprising a head having 1aterally-extending teeth and a downwardly-extending shank formed with a shoulder, and a key driven in the bar from its under side and bent over to engage the shoulder on the finger, substantially as described. In testimony whereof I hereunto affix my signature in presence of two witnesses.

WILLIAM MOCLAVE.

Witnesses:

HENRY A. KNAPP, W. ll/L'BUNNELL. 

